[clay68c10]

Nice description of fuel trims! I wish I would have had someone put it in those terms before I started playing around with tuner pro and TBI.
Also a great way of summarizing the use of NB vs WB. I did my initial TBI tunes on the Caddy in open loop with the wideband, and now do my small tweaks off BLM (fuel trim) values, with the wideband just as a verification since it does respond faster. It is helpful for quicker throttle transitions, maybe the LS pcm reads/responds fast enough. TBI sure doesn’t.